The following moves have helped sculpt some of Hollywood's hottest bodies. They're so good, we featured them in SHAPE's new book The Bikini Body Diet by Tara Kraft.

Lie faceup with legs extended over your hips, hands behind head, and elbows pointing out to the sides. Crunch up, lifting your head and shoulders. Lower your left leg toward the floor as you rotate to the right, bringing your left elbow toward your right knee. Return to starting position; repeat on opposite side. Do 20 reps, alternating sides each rep.

Lie faceup with legs extended over your hips, hands behind head, and elbows pointing out to the sides. Crunch up, lifting your head and shoulders. Lower your left leg toward the floor as you rotate to the right, bringing your left elbow toward your right knee. Return to starting position; repeat on opposite side. Do 20 reps, alternating sides each rep.

Hold a weighted ball with both hands in front of hips, and stand with feet wider than your shoulders, knees slightly bent. Rotate your shoulders to the left, brining the ball outside left your hip. Twist torso to the right as you raise ball up at diagonal to the right. Return to starting position. Switch sides to complete set.

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Alison Sweeney

Deadlift

Works: Core, butt, and legs

Stand holding dumbbells or a light bar with your feet shoulder-width apart, hands slightly wider than your hips and palms facing your body. Keep a straight lower back as you bend your knees, lowering the bar toward to the floor. Rise up to starting position.

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Kate Walsh

Glute SweepWorks: ButtStand facing a wall with feet wide, toes turned out, and arms extended at chest height in front of you, palms pressed against wall. Bend your knees, then rise up on your right leg as you keep your left leg bent and press it up behind you. Return to starting position. Do 15 reps; repeat on opposite side to complete set.

Stand facing box or step, feet shoulder-width apart and arms extended at your sides. Squat, then jump onto the plyo box, using your arms to propel you. Step down to return to starting position and repeat. Do 20 to 25 reps.

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Molly Sims

Side-Lying Knee In

Works: Butt and outer thighs

Lie on your left side with left elbow bent, weight on forearm, and right hand on mat in front of you. Bend your knees, place your right foot behind your left ankle, and raise your left foot, toes pointed. Lift your right knee, then extend your right leg out at a diagonal to the side. Bend right knee and repeat, keeping left calf raised the entire time. Return to starting position.